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Activity A Better Fire!! Activity Advanced Fire Activity Directable Fire!! Activity Fire!! Activity Life Activity Life Lite Activity Spread of Disease Discussion about Agent Modeling Discussion about Chaos Discussion about Chaos is Everywhere Worksheet Emerging Patterns Worksheet Worksheet Emerging Patterns Worksheet (doc) Worksheet Rabbits and Wolves Exploration Questions Worksheet Rabbits and Wolves Exploration Questions (doc)  

This case study is used to teach undergraduate students about hydraulic fracturing (hydrofracking), a controversial method for extracting methane from shale. The controversy arises from claims that chemicals used in the fracking process and the methane itself find their way into drinking water and are also sometimes found at dangerous levels in the air. The case study begins in a college chemistry class where a student inquires about a news item he saw about residents setting their tap water on fire. The instructor uses this as an opportunity for the students to research hydrofracking and natural gas, and she then integrate these topics into their present study of isotopes. The class first examines what isotopes are by using a guided inquiry based activity. The students then learn how mass spectrometry, which uses the principles just learned about isotopes, is employed to determine the source of methane in contaminated wells. This case study is designed for freshman chemistry students and students in environmental studies.

We see color because of specialized light-sensing cells in our eyes called cones. One type, L-cones, sees the reds of strawberries and fire trucks; M-cones detect green leaves, and S-cones let us know the sky is blue. But vision scientists have now discovered that not all cones sense color (see video).

You have probably had the burning sensation of eating a jalapeno or other tear-inducing pepper. What causes this painful fire in your mouth? The short answer is capsaicin. But what exactly is capsaicin? How does it work? Why do people drink milk to relieve the pain? Reactions has the chemistry to answer all of these sizzling questions.

Fact sheets explain ecological issues, define terms and concepts, and provide references for additional information.